<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="./学生系统/index.css" />
  </head>
  <body>
    <div class="wrap">
      <div class="title">学生系统</div>
      <div id="form">
        <p>姓名<input id="username" type="text" value="张三123" /></p>
        <p>年龄<input id="age" type="text" value="21" /></p>
        <p>
          性别
          <select id="gender">
            <option>男</option>
            <option>女</option>
            <option>你猜</option>
          </select>
        </p>
        <p>
          <input type="button" value="添加" id="addBtn" />
          <input type="button" value="排序" id="sortBtn" />
        </p>
      </div>
      <table id="table">
        <thead>
          <tr>
            <th>姓名</th>
            <th>年龄</th>
            <th>性别</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody></tbody>
      </table>
    </div>
    <script>
      var usernameEle = document.querySelector("#username");
      var ageEle = document.querySelector("#age");
      var genderEle = document.querySelector("#gender");
      var addBtn = document.querySelector("#addBtn");
      var tbodyEle = document.querySelector("tbody");
      addBtn.onclick = function () {
        var username = usernameEle.value;
        var age = ageEle.value;
        var gender = genderEle.value;
        tbodyEle.innerHTML += `<tr>
        <td>${username}</td>
        <td>${age}</td>
        <td>${gender}</td>
        <td><button>删除</button></td>
        
        </tr>`;
        addDeleEvent();
      };
      function addDeleEvent() {
        var btns = document.querySelectorAll("td button");
        btns.forEach(function (btn) {
          btn.onclick = function () {
            this.parentNode.parentNode.remove();
          };
        });
      }
    </script>
  </body>
</html>
